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   "source": [
    "# 2.11 行列式"
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   "source": [
    "对于方阵，其行列式 $\\det(\\mathbf{A})$ 是一个矩阵到实数的映射，它等于矩阵所有特征值的乘积。\n",
    "\n",
    "行列式的绝对值可以看成是乘上这个矩阵后空间的变化情况，如果行列式为 0，乘上这个矩阵会使得空间体积变为 0，如果行列式为 1，乘上这个矩阵是保持体积的操作。"
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